File:Cambell filter.png

From Vigyanwiki

Cambell_filter.png(724 × 178 pixels, file size: 8 KB, MIME type: image/png)

This file is from Wikimedia Commons and may be used by other projects. The description on its file description page there is shown below.

Summary

Description
English: Campbell's original sketch of his wave filter. Some annotation removed for clarity.
Date filed 15 July 1915, issued 22 May 1917
Source , Electric wave-filter, US patent 1 227 113
Author George A, Campbell (edited by SpinningSpark)

Licensing

May or may not be in the public domain
In general, the contents of United States patents are in the public domain.

In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):

A portion of the disclosure of this patent document contains material which is subject to (copyright or mask work) protection. The (copyright or mask work) owner has no objection to the facsimile reproduction by any­one of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all (copyright or mask work) rights whatsoever.

The original patent should be checked for the presence of such language before an assumption is made that the contents are in the public domain. (This template can be replaced by {{PD-US-patent-no notice}} in such cases.)


العربيَّة | English | español | 中文 | +/−

Original upload log

Transferred from en.wikipedia to Commons by Sreejithk2000 using CommonsHelper.

The original description page was here. All following user names refer to en.wikipedia.
  • 2009-07-26 15:20 Spinningspark 724×178× (8307 bytes) {{Information |Description=Campbell's original sketch of his wave filter. Some annotation removed for clarity. |Source=, ''Electric wave-filter'', US patent 1 227 113 |Date=filed 15 July 1915, issued 22 May 1917 |Author=George A, Campbell (edited by ~~~)

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

image/png

3216c214d6825e58791343072cd59e21fe883530

8,307 byte

178 pixel

724 pixel

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current12:08, 2 June 2010Thumbnail for version as of 12:08, 2 June 2010724 × 178 (8 KB)wikimediacommons>File Upload Bot (Magnus Manske) {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Campbell's original sketch of his wave filter. Some annotation removed for clarity.}} |Source=Transfer

The following page uses this file: